﻿508 
  ACTINOPTERYGII. 
  

  

  Leptolepis 
  macrophthalmus, 
  Egerton. 
  

   [Plate 
  XVIII. 
  fig. 
  3.] 
  

  

  1845. 
  Leptolepis 
  macrophthalmus, 
  Sir 
  P. 
  Egerton, 
  Quart. 
  Journ. 
  Geol. 
  

  

  Soc. 
  vol. 
  i. 
  p. 
  231. 
  

   1852. 
  Leptolepis 
  macrophthalmus, 
  Sir 
  P. 
  Egerton, 
  Figs. 
  & 
  Descript. 
  

  

  Brit. 
  Organic 
  Remains, 
  dec. 
  vi. 
  (Mem. 
  Geol. 
  Surv.), 
  no. 
  8, 
  pi. 
  viii. 
  

  

  Type. 
  Imperfect 
  fishes 
  ; 
  British 
  Museum. 
  

  

  A 
  large 
  and 
  comparatively 
  slender 
  species, 
  attaining 
  a 
  length 
  of 
  

   about 
  0*24. 
  Length 
  of 
  head 
  with 
  opercular 
  apparatus 
  much 
  ex- 
  

   ceeding 
  the 
  maximum 
  depth 
  of 
  the 
  trunk 
  and 
  contained 
  little 
  more 
  

   than 
  four 
  times 
  in 
  the 
  total 
  length 
  of 
  the 
  fish 
  ; 
  width 
  of 
  caudal 
  

   pedicle 
  equalling 
  nearly 
  one-half 
  of 
  the 
  maximum 
  depth 
  of 
  the 
  

   abdominal 
  region. 
  Vertebras 
  and 
  fins 
  apparently 
  as 
  in 
  L. 
  dubius. 
  

  

  Form. 
  <$f 
  Log. 
  Oxfordian 
  : 
  Wiltshire. 
  

  

  All 
  the 
  following 
  specimens 
  were 
  obtained 
  from 
  Christian 
  Malford, 
  

   near 
  Chippenham 
  : 
  — 
  

  

  P. 
  575, 
  P. 
  576, 
  P. 
  3677. 
  Three 
  specimens 
  described 
  and 
  figured 
  by 
  

   Egerton, 
  loc. 
  cit. 
  1852, 
  to 
  be 
  regarded 
  as 
  the 
  type 
  speci- 
  

   mens. 
  The 
  original 
  of 
  fig. 
  2, 
  loc. 
  cit., 
  is 
  a 
  nearly 
  complete 
  

   fish 
  0-13 
  in 
  length, 
  while 
  the 
  original 
  of 
  fig. 
  3 
  is 
  very 
  

   imperfect 
  and 
  wants 
  the 
  caudal 
  region. 
  

  

  Egerton 
  Sf 
  Enniskillen 
  Colls. 
  

  

  46344. 
  Fine 
  specimen 
  0*235 
  in 
  length 
  showing 
  the 
  axial 
  skeleton, 
  

   the 
  abdominal 
  vertebras 
  apparently 
  with 
  broad 
  transverse 
  

   processes 
  by 
  which 
  the 
  delicate 
  ribs 
  are 
  supported 
  

   (PL 
  XVIII. 
  fig. 
  3). 
  Ounnington 
  Coll. 
  

  

  20090. 
  Ten 
  imperfect 
  fishes, 
  variously 
  preserved, 
  and 
  one 
  head 
  with 
  

   opercular 
  apparatus 
  and 
  pectoral 
  fin. 
  The 
  radiating 
  

   markings 
  on 
  the 
  preoperculum 
  are 
  confined 
  to 
  its 
  lower 
  

   limb 
  and 
  are 
  fine 
  and 
  numerous. 
  Purchased, 
  1846. 
  

  

  19959. 
  Small 
  fish, 
  with 
  imperfect 
  head 
  and 
  tail. 
  Purchased, 
  1846. 
  

  

  21435. 
  Small 
  specimen 
  displaying 
  the 
  paired 
  fins, 
  the 
  pectoral 
  with 
  

   not 
  less 
  than 
  16, 
  the 
  pelvic 
  with 
  not 
  less 
  than 
  9 
  rays. 
  

   The 
  latter 
  are 
  more 
  than 
  two-thirds 
  as 
  long 
  as 
  the 
  former. 
  

  

  Purchased, 
  1847. 
  

  

  24676, 
  26470. 
  Two 
  large 
  and 
  two 
  small 
  specimens. 
  The 
  pelvic 
  

   fin-supports 
  are 
  exhibited. 
  Purchased, 
  1850-51. 
  

  

  P. 
  936, 
  P. 
  5145-46. 
  One 
  large 
  fragment 
  and 
  seven 
  small 
  specimens 
  

   more 
  or 
  less 
  imperfect. 
  Egerton 
  Coll. 
  

  

  